Can I buy my Friends and Family Tickets on the door? Unfortunately not, these have to be purchased in advance. For more information, please visit the Merlin Annual Pass website. Related articles How do I purchase Friends and Family Tickets for SEA LIFE London? How much are tickets to SEA LIFE London? Where can I purchase my tickets? Can we all enter the attraction at the same time through the same door? Can I pre-book my visit with a Merlin Annual Pass?